Which of the following would be a virulence factor of a pathogen?
a surface protein allowing the pathogen to bind to host cells
a secondary host the pathogen can infect
a surface protein the host immune system recognizes
the ability to form a provirus

The correct answer is option - a surface protein allowing the pathogen to bind to host cells

Explanation:

Virulence factors are substances or molecules released by pathogens such as bacteria, fungi, viruses and protozoa that enhance their function effectiveness and enable them to get the following-

Attachment to host cell and surface.

Evasion of the immune response of the host.

Suppression or inhibition of the immune response  of host.

Getting nutrition from the host cells

Thus, the correct answer is option - a surface protein allowing the pathogen to bind to host cells.

a=c and then d= c because of the band so you get ac/dc and you add them together you get sound waves